<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
   <script>
        var obj={};
        console.log(obj.__proto__)
        obj.__proto__ = ['push', 'pop', 'shift', 'unshift', 'splice', 'sort', 'reverse']
        console.log(obj.__proto__)
   </script>
</body>
</html>